21246705

素因数分解:

$3^7\times 5^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:122

約数の個数: 64

約数和(自身を含む): 40147200

約数和(自身を除く): 18900495

約数列:

[1, 3, 5, 9, 15, 27, 29, 45, 67, 81, 87, 135, 145, 201, 243, 261, 335, 405, 435, 603, 729, 783, 1005, 1215, 1305, 1809, 1943, 2187, 2349, 3015, 3645, 3915, 5427, 5829, 7047, 9045, 9715, 10935, 11745, 16281, 17487, 21141, 27135, 29145, 35235, 48843, 52461, 63423, 81405, 87435, 105705, 146529, 157383, 244215, 262305, 317115, 472149, 732645, 786915, 1416447, 2360745, 4249341, 7082235, 21246705]

約数ペア:

[(1, 21246705), (3, 7082235), (5, 4249341), (9, 2360745), (15, 1416447), (27, 786915), (29, 732645), (45, 472149), (67, 317115), (81, 262305), (87, 244215), (135, 157383), (145, 146529), (201, 105705), (243, 87435), (261, 81405), (335, 63423), (405, 52461), (435, 48843), (603, 35235), (729, 29145), (783, 27135), (1005, 21141), (1215, 17487), (1305, 16281), (1809, 11745), (1943, 10935), (2187, 9715), (2349, 9045), (3015, 7047), (3645, 5829), (3915, 5427)]